/* $NetBSD: qemufwcfg_fdt.c,v 1.2 2021/01/27 03:10:21 thorpej Exp $ */

/*-
* Copyright (c) 2017 Jared McNeill <[email protected]>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: qemufwcfg_fdt.c,v 1.2 2021/01/27 03:10:21 thorpej Exp $");

#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/mutex.h>
#include <sys/bus.h>

#include <dev/fdt/fdtvar.h>

#include <dev/ic/qemufwcfgvar.h>

static int      fwcfg_fdt_match(device_t, cfdata_t, void *);
static void     fwcfg_fdt_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(qemufwcfg_fdt, sizeof(struct fwcfg_softc),
   fwcfg_fdt_match,
   fwcfg_fdt_attach,
   NULL,
   NULL
);

static const struct device_compatible_entry compat_data[] = {
       { .compat = "qemu,fw-cfg-mmio" },
       DEVICE_COMPAT_EOL
};


static int
fwcfg_fdt_match(device_t parent, cfdata_t match, void *opaque)
{
       struct fdt_attach_args * const faa = opaque;

       return of_compatible_match(faa->faa_phandle, compat_data);
}

static void
fwcfg_fdt_attach(device_t parent, device_t self, void *opaque)
{
       struct fwcfg_softc *sc = device_private(self);
       struct fdt_attach_args * const faa = opaque;
       bus_addr_t base;
       bus_size_t size;

       if (fdtbus_get_reg(faa->faa_phandle, 0, &base, &size) != 0) {
               aprint_error_dev(self, "couldn't get registers\n");
               return;
       }

       sc->sc_dev = self;
       sc->sc_bst = faa->faa_bst;

       if (bus_space_map(sc->sc_bst, base, size, 0, &sc->sc_bsh) != 0) {
               aprint_error_dev(self, "couldn't map registers\n");
               return;
       }

       aprint_naive("\n");
       aprint_normal("\n");

       fwcfg_attach(sc);

       pmf_device_register(self, NULL, NULL);
}